In the rapidly evolving landscape of AI-assisted development, a remarkable open-source project has captured the imagination of developers worldwide. Agency Agents, created by Marek Sitarzewski, brings together over 120 specialized AI agent personas organized into 12 divisions, effectively placing a complete AI agency at your fingertips.
What is Agency Agents?
Agency Agents is a carefully curated collection of specialized AI agent definitions, each with a unique personality, core mission, workflow process, concrete deliverables, and measurable success metrics. What makes this project truly revolutionary is what it does not contain: zero actual code. Every single agent is defined entirely in Markdown.
| Metric | Value |
|---|---|
| GitHub Stars | 86,100+ |
| Forks | 13,800+ |
| License | MIT |
| Agents | 120+ |
| Divisions | 12 |
| Primary Language | Shell (Markdown-based) |
| Contributors | 68+ |
The project’s philosophy is simple yet profound: an agent’s power comes from its definition, not its implementation. By defining who an agent is rather than just what it does, Agency Agents delivers outputs that are reproducible, specialized, and genuinely production-ready.
The 12 Divisions
Each agent belongs to one of 12 specialized divisions, mirroring the structure of a real-world digital agency:
Engineering Division
The largest division, with over 20 agents covering frontend development, backend architecture, mobile engineering, AI/ML engineering, DevOps, security engineering, site reliability engineering (SRE), and code review. Each engineering agent comes with technical deliverables, architecture patterns, and quality gates baked into its definition.
Design Division
Eight design specialists including UI designers, UX researchers, brand identity designers, visual storytellers, and a delightful “whimsy injector” agent dedicated to adding personality and delight to user experiences. The design division also includes an image prompt engineer for AI-generated visual assets.
Marketing Division
A comprehensive marketing team with 18+ agents spanning growth hacking, content creation, social media strategy, and platform-specific specialists for TikTok, Reddit, Twitter/X, and key Chinese platforms like Xiaohongshu and WeChat. The Reddit community builder agent has a critical rule that perfectly captures the project’s ethos: “You are not marketing on Reddit – you are becoming a valued community member who happens to represent a brand.”
Sales Division
Eight sales agents covering outbound strategy, discovery coaching, deal strategy, proposal building, and sales operations. Each agent comes with sales methodology frameworks and measurable conversion metrics.
Paid Media Division
Seven paid media specialists handling PPC strategy, search advertising, programmatic buying, ad creative strategy, and analytics. These agents are designed to optimize campaign performance across platforms.
Product Division
Product management agents covering sprint prioritization, trend research, user feedback analysis, and product strategy. These agents help bridge the gap between technical execution and business outcomes.
Project Management Division
Project management agents including studio producers, workflow coordinators, and operations specialists. They bring structure to complex projects with defined processes and timeline management.
Testing Division
Eight quality assurance agents including functional testing, performance testing, accessibility auditing, and a particularly intriguing “evidence collector” and “reality checker” pair designed to validate outputs against requirements.
Support Division
Six support agents covering customer support, support analytics, legal consultation, and finance operations. These agents handle post-delivery lifecycle management.
Spatial Computing Division
Six cutting-edge agents for extended reality (XR), visionOS development, WebXR, and immersive interface architecture. This division reflects the growing importance of spatial computing in the modern tech landscape.
Game Development Division
With 19 agents, this is one of the largest divisions. It includes game designers, level designers, technical artists, and specialists for Unity, Unreal Engine, and Godot. From concept prototyping to final build optimization, the game dev division covers the full development pipeline.
Specialized Division
A diverse collection of 14+ vertical-specific agents covering civil engineering, healthcare, legal research, academic writing, and other niche domains. This division demonstrates the flexibility of the persona approach beyond software development.
Why It Went Viral (86,100+ Stars)
Agency Agents struck a nerve in the developer community because it solved a problem everyone felt but few had articulated: generic LLM prompts suffer from “role drift.” When you tell an AI to “act as a frontend developer,” it starts strong but quickly loses focus. By contrast, a well-defined Agency Agents persona maintains its character, process, and quality standards throughout an entire session.
The project’s explosive growth tells its own story:
- Peaked at 23,000 new stars in a single week in March 2026
- Topped GitHub’s weekly trending charts repeatedly
- Spawned community translations into Chinese (the
agency-agents-zhfork expanded to 211 agents across 18 departments) - Inspired other tools and frameworks to adopt the persona pattern
Anatomy of an Agent
Every agent in the collection follows a consistent structure:
- Identity and Memory – Who the agent is, its personality, communication style, and background
- Core Mission – What the agent optimizes for and its primary objective
- Critical Rules – Hard constraints and non-negotiable behaviors
- Technical Deliverables – Concrete outputs the agent produces
- Workflow Process – Step-by-step execution paths the agent follows
- Success Metrics – How the agent measures its own performance
This structure ensures that every agent, whether a frontend wizard or a Reddit community ninja, operates with the same level of professionalism and consistency.
Getting Started
Agency Agents supports a wide range of AI coding tools, each with its own installation path:
Claude Code (Recommended)
Simply copy the agent definitions into your Claude Code agents directory:
cp -r agency-agents/* ~/.claude/agents/
Then activate any agent by name: “Hey Claude, activate Frontend Developer mode.”
One-Click Install for All Tools
The project provides a versatile conversion and installation system:
./scripts/convert.sh # Generate files for all supported tools
./scripts/install.sh # Auto-detect and install to the right locations
./scripts/install.sh --tool cursor # Target a specific tool
Supported Tools
The convert.sh script handles format transformation for Claude Code, Cursor, Aider, Windsurf, Gemini CLI, GitHub Copilot, OpenCode, Codex CLI, Qwen Code, and more. Each tool receives agent definitions in its native format, from .mdc files for Cursor to a single CONVENTIONS.md for Aider.
The Bigger Picture
Agency Agents represents a fundamental shift in how we think about AI interaction. It proves that the quality of an AI agent’s definition – who it is, how it thinks, what it delivers – matters more than the sophistication of its implementation framework. The project has effectively introduced professional persona engineering as a discipline.
The same .md files that earned 86,000+ GitHub stars are pure text. No neural network architecture. No agentic framework. No vector database. Just carefully crafted definitions of expertise, personality, and process.
For the broader AI community, the lesson is clear: invest in defining who your AI agents are. Give them personalities, processes, and principles. The code is secondary.
Project Links
- GitHub Repository
- AGENT-ZERO: Operational Framework by the same author
- Chinese Community Edition (211 agents)
Related Reading
If you found this project interesting, you might also enjoy our guides on Claude Code, OpenCodex CLI, and our comprehensive roundup of the top AI GitHub projects.
